Diagnostic Procedure

1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
   Fig 1: Checking Fuel Filler Cap Design

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: GO TO 2
2. NG: Replace with genuine NISSAN fuel filler cap.

Check that the cap is tightened properly by rotating the cap clockwise.

OK or NG 

1. OK: GO TO 3.
2. NG:
   • Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
   • Retighten until ratcheting sound is heard.

Check for air releasing sound while opening the fuel filler cap.

OK or NG 

1. OK: GO TO  5 .
2. NG: GO TO 4.

1. Wipe clean valve housing.
2. Check valve opening pressure and vacuum. See Figure and Figure .

   Pressure: 

   15.3 - 20.0 kPa (0.156 - 0.204 kg/cm ², 2.22 - 2.90 pis) 

   Vacuum: 

   -6.0 to -3.3 kPa (-0.061 to -0.034 kg/cm ², -0.87 to -0.48 psi 

   CAUTION: Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.

OK or NG 

1. OK: GO TO 5.
2. NG: Replace fuel filler cap with a genuine one.

To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely.

Fig 2: Installing EVAP Service Port Adapter & Pressure Pump Assembly

Courtesy of NISSAN MOTOR CO., U.S.A.

See also Figure .

1. Models with CONSULT-II: GO TO 6.
2. Models without CONSULT-II: GO TO  7 .

With CONSULT-II 

1. Turn ignition switch ON.
2. Select EVAP SYSTEM CLOSE of WORK SUPPORT mode with CONSULT-II.
3. Touch START and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph.
   NOTE:

   • Never use compressed air or a high pressure pump.
   • Do not exceed 4.12 kPa (0.042 kg/cm² , 0.6 psi) of pressure in the system.